Upon the filing of any such petition, the director of labor and industries shall notify the other party to the dispute of the time and place when and where such petition will be heard, and may set said petition for a hearing before a regularly appointed deputy at such place in the state as he or she shall determine is most convenient for the parties, and the director or his or her deputy shall have power and authority to issue subpoenas to compel the attendance of witnesses and the production of books, papers, and records at such hearing, and to administer oaths. Obedience to such subpoenas shall be enforced by the courts of the county where such hearing is held.